Readers' comments

So long as we have Gerrymandering and primaries, the loonies will control the selection of candidates. Normal people have lives that they value much more than politics. It is very much to the politicians' advantage to keep extreme people focused on peripheral hobby-horses, because if the mass of the electorate understood the system of open bribery that American politics has become, they would probably get angry enough to do something about it. So where are the news media, who ought to let them know? Having lunch with those they ought to expose.
.
Suppress the excessive influence of the extremes, and the rise of the center will follow.

Perhaps political journalists could help by abandoning the easy metaphor of a single dimension spectrum of political opinion? There is more than just left and right. The terminology of quantum mechanics may prove a fertile source of inspiration.